Thales

Raphaël Horak

Ludovic Perruchot

Yves Courcol

Images of a scene are acquired from a moving carrier that is equipped with a sensor. The angular direction of the line of sight of the sensor is automatically controlled. The acquisition is carried out: for a first position of the carrier, with automatic control allowing an outward scan, combined with a scan in step-and-stare mode with a biaxial stare micro-movement, of a band of terrain of the scene to be carried out, a first strip of images thus being acquired, at least one other strip of images of the same zone of terrain being acquired by reiterating these scanning steps for at least one other position of the carrier, and each image of another strip being acquired with a preset degree of overlap with the images of the first strip.

Method for acquiring images of a scene, from a sensor on board a moving carrier, with servocontrol of its line of sight

A system for acquiring images in color and near-infrared, comprising: a matrix sensor, which comprises first, second, and third types of pixels sensitive to respective visible colors and a fourth type of panchromatic pixels sensitive in the near-infrared; and a signal processing circuit configured to reconstruct first and second sets of monochromatic images, a panchromatic image, a color image from the images of the first set and from the panchromatic image, and at least one image in the near-infrared from the images of the second set and from the panchromatic image. A visible-near-infrared bispectral camera comprises such an acquisition system and method implemented by means of such a camera.

System and method for acquiring visible and near infrared images by means of a single matrix sensor

A method of mosaicing of a scene as a 3D mosaic, characterized in that at least one 3D reconstruction having been obtained, comprises the following steps: A) acquiring successive images by means of a panoramic sensor moving in displacement along a predefined mosaicing trajectory, the last image acquired being referred to as the current panoramic image; B) choosing one or more scene-related projection surfaces on which the mosaic will be constructed, C) from the textures of the panoramic images overlapping each 3D reconstruction, retrieving the textures originating from the current panoramic image, D) from among these textures, selecting the visible parts in each projection surface with the aid of the 3D reconstruction, E) projecting these textures onto each projection surface and fusing the textures in each projection surface to thus obtain a conformal mosaic on each projection surface.

Method of panoramic 3D mosaicing of a scene

The invention relates to a method of 3D reconstruction of a scene by means of 2D panoramic images of the scene, which comprises a step of processing these images. These images arise from a panoramic system moving in displacement along a determined trajectory, such that the image of at least one point of the scene is in at least 3 successive images obtained according to various directions; the step of processing these 2D successive images comprises the sub-steps:

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Elancourt, France

Raphaël Horak